#include "BluetoothSerial.h"
#include "DHT.h"
#if !defined(CONFIG_BT_ENABLED) || !defined(CONFIG_BLUEDROID_ENABLED)
#error Bluetooth is not enabled! Please run `make menuconfig` to and enable it
#endif
String message = "";
unsigned long previousMillis = 0;
int interval = 2000;
String tempString,humString;
BluetoothSerial SerialBT;
DHT dht(22,DHT22);
void setup() {
  Serial.begin(115200);
  SerialBT.begin("ESP32_AT051"); //Bluetooth device name
  Serial.println("The device started, now you can pair it with bluetooth!");
}

void loop() {
  unsigned long currentMillis = millis();
  if (currentMillis - previousMillis >= interval){
    previousMillis = currentMillis;
    //tempString = String(dht.readTemperature()) + "C";
    //humString = String(dht.readHumidity()) + "%";
    tempString = String(random(50)) + "°C";
    humString = String(random(100)) + "%";
  }
  // Read received messages (LED control command)
  if (SerialBT.available()){
    char incomingChar = SerialBT.read();
    if (incomingChar != '\n'){
      message += String(incomingChar);
    }
    else{
      message = "";
    }
    Serial.write(incomingChar);  
  }
  // Check received message and control output accordingly
  if (message =="show_temp"){
    SerialBT.println(tempString);
  }
  else if (message =="show_hum"){
    SerialBT.println(humString);
  }
  delay(20);
}